[Gasification] Question from Philip Pedros - A working Sewage Sludge (Biosolids) to Energy plant in the UK

[David Pitt]

Gentlemen

We have developed a full scale sludge to energy gasification plant in
conjunction with Yorkshire Water in the UK. The link below has a video
which describes the plant and shows the physical set up and operational
configuration which will give you a very good orientation to its scale and
level of development.

www.youtube.com/watch?v=M2D3xQIpeiY

Be very happy to provide further information and of course be delighted
should anyone have a potential project application they would like to
discuss.

Regards

*david*

*David Pitt*
*Director*
*Enertecgreen Limited*



*M: +44 7785 230 109O: +44 1753 910321www.enertecgreen.com
<http://www.enertcgreen.com>*
*Enertecgreen Ltd -Building 1 - Chalfont Park - Gerrards Cross - SL9 0BG -
UK*

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On 23 September 2018 at 00:15, Tom Miles <tmiles at trmiles.com> wrote:

> Biosolds are typically gasified in combination with wood or another bulky
> biomass. I think the City of Lebanon has incorporated biosolids in their
> fuel mix of dry urban wood waste.  Aries Energy purchased a fluidized bed
> gasifier developed for biosolids but it is not intended for engine
> generation. In about 1985 City of Los Angeles ran three bubbling fluidized
> bed gasifiers on dried digester gas. Heat was recovered in a  steam boiler.
> The project lasted about five years. There have been many small scale
> experiments using dried biosolids in gasifiers for engines. I am not aware
> any upgrading the gas.
>
>
>
> A few years go Anaergia Inc ran a Biogreen Energy pyrolyzer in which the
> dried biosolids from an anaerobic digester were carbonized.  The pyrolysis
> gas was put back into the digester using a process patented by Washington
> State University. The enriched digester gas was burned in an engine. A
> project to build a larger system was announced for the City of Los Angeles
> was not built.
>
>
>
> Tom
>
>
>
> *From:* Gasification <gasification-bounces at lists.bioenergylists.org> *On
> Behalf Of *Pedros, Philip
> *Sent:* Saturday, September 22, 2018 1:56 PM
> *To:* Discussion of biomass pyrolysis and gasification <
> gasification at lists.bioenergylists.org>
> *Subject:* Re: [Gasification] Question from Philip Pedros
>
>
>
> Mr. Williams
>
>
>
> The question was from me and reflects my limited knowledge of
> gasification, not the company’s.
>
>
>
> I did not ask about digester gas being used to generate power, nor am I
> aware of digester gas being referred to as syngas, as your statement
> implies.  Apparently I should have stated that the feed stock to the
> gasifier was thermally dried biosolids.
>
>
>
> What I asked and what was answered is in point 3 below.  I am not aware of
> syngas from a gasifier, with municipal biosolids as the feedstock, directly
> fueling a CHP and was asking if it has been done.
>
>
>
> Thank you,
>
> Philip Pedros
>
>
>
>
>
>
>
>
>
> Philip B. Pedros, Ph.D., P.E., BCEE
>
> Technical Lead II
>
> AECOM
>
> 250 Apollo Drive
>
> Chelmsford, MA 01824
>
> C: 781 258-8829
>
> Philip.Pedros at aecom.com
>
>
>
> *From:* Gasification [mailto:gasification-bounces at lists.bioenergylists.org
> <gasification-bounces at lists.bioenergylists.org>] *On Behalf Of *Doug
> *Sent:* Saturday, September 22, 2018 4:25 PM
> *To:* gasification at lists.bioenergylists.org
> *Subject:* Re: [Gasification] Question from Philip Pedros
>
>
>
> Hi Philip,
>
> Your question is really in several parts:
>
> 1. If you are referring to waste water containing sewage sludge, then yes
> you will have the gas present.
>
> 2. Untreated Sewage gas (to clarify which syngas you are talking about)
> cannot be fed directly into engines without at least a scrubber between the
> gasometer storage and engine.
>
> 3. The gas calorific value of 120-150 Btu/scf is perfectly adequate to run
> an engine and does not need boosting.
>
> 4. The technology you seek is already employed at many City Sewage plants,
> generating power to run the plant.
>
> 5. I suggest you find working installations, there must be quite a few in
> the USA.
>
> Can I ask you why you or your organization think this is by your question,
> unknown technology?
>
> Regards,
>
> Doug Williams.
>
>
>
> On 23/09/18 07:49, tmiles at trmiles.com wrote:
>
> Can untreated syngas generated from municipal wastewater sludge be used
> directly to generate power?  It is my understanding that the heating value
> of untreated syngas (120 – 150 But/scf), is too low to feed directly to
> engines and that some type of post treatment to boost the heating value to
> 190 -200 is typically economically prohibitive.   Any information on such
> post treatment and an case studies were this has been done would be
> appreciated.
>
>
>
> Thank you,
>
> Philip Pedros
>
>
>
>
>
>
>
> Philip B. Pedros, Ph.D., P.E., BCEE
>
> Technical Lead II
>
> AECOM
>
> 250 Apollo Drive
>
> Chelmsford, MA 01824
>
> C: 781 258-8829
>
> Philip.Pedros at aecom.com
>
>
>
>
>
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